From 64d95837e9813541cf5b357de13865ce687ae98d Mon Sep 17 00:00:00 2001 From: Adam Brewer Date: Mon, 16 Oct 2023 07:37:12 -0400 Subject: Update Exercises Directory Names to Reflect Order --- exercises/13_error_handling/errors3.rs | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 exercises/13_error_handling/errors3.rs (limited to 'exercises/13_error_handling/errors3.rs') diff --git a/exercises/13_error_handling/errors3.rs b/exercises/13_error_handling/errors3.rs new file mode 100644 index 0000000..d42d3b1 --- /dev/null +++ b/exercises/13_error_handling/errors3.rs @@ -0,0 +1,34 @@ +// errors3.rs +// +// This is a program that is trying to use a completed version of the +// `total_cost` function from the previous exercise. It's not working though! +// Why not? What should we do to fix it? +// +// Execute `rustlings hint errors3` or use the `hint` watch subcommand for a +// hint. + +// I AM NOT DONE + +use std::num::ParseIntError; + +fn main() { + let mut tokens = 100; + let pretend_user_input = "8"; + + let cost = total_cost(pretend_user_input)?; + + if cost > tokens { + println!("You can't afford that many!"); + } else { + tokens -= cost; + println!("You now have {} tokens.", tokens); + } +} + +pub fn total_cost(item_quantity: &str) -> Result { + let processing_fee = 1; + let cost_per_item = 5; + let qty = item_quantity.parse::()?; + + Ok(qty * cost_per_item + processing_fee) +} -- cgit v1.2.3